The Istanbul-based Kandilli Observatory reports the quake hitting at 4:16 p.m. (1416 GMT) Tuesday off the shores of Turkey's northwestern area. There may still be outstanding damage unreported and sources are investigating the possibilities.

The Athens Geodynamic Institute in Greece put the magnitude of the jolt at 5.9 and said the quake straddled the Greek islands and the Turkish mainland. Greece's Lemnos and Lesvos, a stone-throw from the Turkish coast, suffered the initial blast and a mild reverberation was felt in Athens. From the Greek side of the equation, the preliminary magnitude registered was 5.7, as put out by the U.S. Geological Survey, says AP.